Machine for manufacture of paper boxes.



E. SCHLEGEL.

MACHINE FOR MANUFACTURE OF PAPER BOXES,

APPLICATION FILED MAR.24. 1915.

Patented Dec. 14, 1915.

3 SHEETS-SHEET I.

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MACHINE FOR MANUFACTURE OF PAPER BOXES.

APPLICATION FILED MAR. 24; 1915.

1,163,853. Patented Dec. 14, 1915.

3 SHEETS-SHEET 2.

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MACHINE FOR MANUFACTURE OF PAPER BOXES.

Patented Dec. 14, 1915.

3 SHEETS-SHEET 3- APPLICATION FILED MAR. 24, I915.

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ERNEST SCI-ILEGEL, F CLEVELAND, OHIO.

MACHINE FOR MANUFACTURE OF PAPER BOXES.

Specification of Letters Patent.

Patented Dec. 14, 1915.

Application filed March 24, 1915. Serial No. 16,570.

To (ZZZ whom it may concern:

plunger head or former.

Be it known that I, ERNEST SCHLEGEL, a subject of the Emperor ofGermany, residing at Cleveland. in the county of Cuyahoga and State ofOhio, have invented certain new and useful Improvements in Machines forManufacture of Paper Boxes, of which the following is a specification.

This invention relates tomachines for the manufacture of paper boxes,such as me cream boxes, oyster pails and the like, and especially tomachines 'ofthe plunger and die type, in which a plunger or formeroperates on a previously cut blank, for the purpose of folding the sameand gluing its flaps in proper position.

The object of the invention is to produce an improved machine of thetype stated, as will more fully appearfrom the following description.

In the accompanying drawings, Figure 1 is aperspective of the machine.Fig.2 is a vertical section. Fig. 3 is a horizontal section showing theoperating parts under the table top. Fig. 4 is a sectional view of theFigs. 5 to are details in side elevation of the various folders andtheir operating devices. Fig. 11 is a detail in vertical section ofdevices for withdrawing the boX after it is formed.

Referring specifically t0 the drawings, the box blankas shown comprisesa bottom B, opposite sides C and F, end flaps D D and G G and bottomflaps E E, which flaps are folded to form a substantially rectangularbox by the machine.

12 indicates the machine table or top, standing on legs 12 and having atransverse opening 12, and lateral slots 12 for folding rollers to bedescribed.

The power shaft 14 is mounted in bearings 13 on two of the table legs.On the shaft is a cam 15 which operates on a roller 16 carried by alever 17 which is fulcrumed on the fulcrum shaft or rod 18 supported bybrackets 18 and the lever is connected by a link 19 to a lever 21fulcrumed on a bracket 20 and having a counter-weight 21*. This lever isconnected by a link 22 to a lever 24 which is fulcrumed at 23 on astandard 23 on the table top, and the lever is connected by links 25 toa plunger 26 which is guided by a spline 26 in a sleeve 23 on the standard. The lower end of the plunger has a former block or head 27 theshape of which corresponds to that of the box to be formed.

At the bottom of the former is an ejector plate 27 which is pressed fromabove by springs 27 coiled around the stems 27 of the ejector plate, andthese stems work in recesses 27 in the head, the movement being limitedby stop pins 27 which extend through slots 27 in the stems. The shaft 14also carries a cam 28 working on a roller 29 carried by a lever30 whichis fulcrumed on the rod 18 and which is connected by a link 31 to ablock 32 located directly under the plunger. This block carries a pairof upwardlv proiecting fingers 33 which fold the flaps D of the box, andalso a pair of spring fingers 34 which proiect upwardly and carry attheir upper ends a pair of rollers 35 which fold the bottom flaps E ofthe box. A block 36 depends from the table top on which the bottom B ofthe box rests during the forming operation. This block guides therollers 35 to the plunger vhead. The shaft 14 also carries a cam 37which operates on a roller 38 carried by a lever 39 which is fulcrumedon the rod 18 and which is connected by a link 40 to a lever 41 which isfulcrumed on a bracket 42 depending from the table top and connected bva link43 to a folding leaf or plate 44 which is pivoted at 45 to thetable top at one side or back of the forming position. The shaft 14 alsocarries a cam 46 which operates on a roller 47 carried by a lever 48which is fulcrumed on the rod 18 and which is connected by a link 49 toa swinging arm 50 which is fulcrumed at 51 and by a link 52 to anopposite folding leaf or plate 53 which is pivoted at 54 adjacent theopposite side of the forming position. 'The shaft 14 also carries a pairof cams 55 which operate on rollers 56 carried by a pair of levers 57which are fulcrumed on the rod 18 and which are provided at their upperends with rollers 58 which swing in the slots 12 in the table top andact to fold the flaps G of the box.

The shaft 14 carries a bevel gear 59 which meshes with a bevel gear 60on a transverse shaft 62 mounted in bearings 61 on the frame, and thisshaft 62 has thereona cam 63 which operates on a lever 64 which isfulcrumed to a bracket 65 on the floor. The upper end of this lever ispivotally connected to a projection 66 depending from a slide 67 workingin guides 90, and on this slide is mounted a'slide plate 68 having aslot 68 into which projects a stop pin 72 on the slide 67. r The pinacts as a guide and stop for the slide 67 and prevents sidewise movementof said slide, the pin moving along in the slot. The plate 68 worksunder a strap (39 and has stop pins 70 and 71 which strike said strap atthe limit of movement in either direction. The plate (37 has a screwstud 77 which forms the pivot of a pair of crossed arms 73 and 71 whichhave gripping fingers and 76 arranged at opposite sides of the opening12 in position to grasp a box after it is formed and the plunger head 27withdrawn therefrom. The fingers are opened and closed by a pinprojecting from the slide (38 through holes in links 91 pivoted to theouter ends of the arms 73 and 74:, a slot 92 in the slide 67 providingroom for the pin to work. Then the slide 67 is advanced it carries withit the plate 68 until the pin 71 strikes the strap 69 which by the meansdescribed acts to close the fingers 75 and 76 against the sides of thebox, and the slide 67 is then retracted or removed outwardly, carryingwith it the plate 68 until the pin 70 strikes the strap 69, as shown inFig. 11, which acts to spread the arms, by means of the links 91,opening the fingers 75 and 76 and releasing the box which then dropsthrough the opening 12 into the chute S3 in which the completed boxesare nested. The cam 63 advances the slide 67. It is retracted by aspring 82 which is connected to the slide and to a bracket 81 on theside of the frame. Spring 78, bearing against the arms 73 and 74,provides tension which is regulated by a nut 79 on the stud 77.

In operation, the box blank is placed on the table under the plunger.against pins 12 to properly position the same. The plunger thendescends, the plate 27 pressing against the bottom B and the springs 27being compressed. The cam 37 then acts to swing up the leaf 44 whichfolds the side C up against the head 27-. At or about the same time thecam 28 acts to lift the block 32 and the fingers 33 which fold the flapsD up and in against the ends of the head 27. The second rise of the cam28 then continues the lift of the block 32 and the rollers 35 fold upthe flaps E against the outer sides of the flaps D, as shown in Fig. 8.Then the cam 46 operates to lift the leaf 53 which folds up the flap Fagainst the side of the head 27; and finally the cams 55 operate toswing up the levers '57 whose rollers 58 move up and across through theslots 12 and against the flaps G and fold said flaps inwardly overthe'flaps D and E, thereby completing the box, It should be mentionedthat the flaps D, E and G are all gummed before the blank is fed to themachine. After the box is so folded the cams permit reverse movement ofthe folding devices to the original position. Then the head 27 is liftedby the counterweight 21*, the plate 27*, in consequence of the springs27 acting to release the box from the head so that the box will not belifted as the plunger head withdraws. The completed box is thus leftstanding in position onthe table top, from which it is withdrawn asdescribed above. That is, briefly stated, the fingers 75 and 76 are advanced and grip the box therebetween, and are then retracted and openedto drop the box through the opening l2 into the chute S3.

The invention is not limited to the exact mechanism shown, but may bemodified in various ways within the scope of the invention.

What I claim as new is:

1. In a box making machine, the combination with a table having anopening therein, and box-forming mechanism adapted to form a box on saidtable, of box removing mechanism movable across the table between thebox forming position and said opening, and adapted to remove a box fromsaid position and drop the same through said opening.

2. In a box makingmachine, the combination with a table,andmeans to forma box thereon, including a vertically movable plunger, of laterallymovable gripping devices having jaws movable across the table atopposite sides of the box and arranged to engage the box and withdrawthe same laterally after the plunger lifts.

3. In a box making machine,the combination of a table, avertically-movable form working toward and from the table, means to foldside flaps against said form, and

means to fold inner and outer end flaps upon said form; including a pairof swinging levers pivoted below the table top and swinging laterallyacross the ends of said form, pressure devices carried by said leversand arranged toengage and fold the outer end flaps. e

4:. In a box making machine, the combination of a table, avertically-movable form working toward and from the table, means to foldside flaps against said form, and means to fold inner and outer endflaps upon said form; including a pair of swinging levers pivoted belowthe table top and swinging across the ends of said form, and rollerscarried by said levers and arranged to fold and roll over the outer endflaps.

5. In a box making machine, the combination of a table having slots, aform movable vertically toward and from said table and adapted to pressthe bottom of a blank upon said table, means to fold side flaps againstsaid form, a pair of vertically movable rollers, working through thetable and adapted to fold inner end flaps against said form, a pair ofswinging levers located below the table top, and rollers carried by theadapted to fold the outer end-flaps.

6. In a box making machine, the combination of a table having openingsin the top thereof, a former movable vertically toward and from thetable top, means to fold side flaps against said former, a verticallymovable block located under the table top, fingers and spring supportedrollers carried by said block and Working through said openings to foldinner end flaps against the former, and means Working through otheropenings in the table top to fold outer end flaps against the inner endflaps.

7. In a box making machine, a box-removing mechanism comprising incombination, a reciprocating slide, a pair of pivoted arms carriedthereon and having gripping fingers, and means actuated by thereciprocation of said slide to open and close said arms.

8. In a box making machine, a box removing mechanism comprising incombination, a reciprocating slide, a pair of crossed arms pivoted onsaid slide and having gripping fingers at one end, shiftable platemounted on said slide and connected to said arms, and means to shift theplate at the end of each stroke of the slide, to close and open the armsand thereby grip and release a box.

9. In a box making machine, the combination of a table having adischarge opening therein, a chute beneath said opening, means to form abox on the table in a position at one side of said opening, and means toWithdraw 'a formed box laterally from said position and drop it throughthe opening.

In testimony whereof, I aflix my signature in presence of two witnesses.

ERNEST SCI-ILEGEL.

Witnesses:

GUSTAVE C. REINNER, J OHN A. BOMMHARDT.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

